Inappropriate Information

Don't add comments about things unrelated to the current code - e.g. file/changelist histories, or meta data like authors, last modified, etc.

/*
 * This comment is clutter!
 *   Changelog:
 *   01/01/01 - first change
 *   02/01/01 - second change
 *   03/01/01 - third change
 *   04/01/01 - fourth change
 */
public void doStuff() {
 ...
}